William Fletcher Elkin b.June 26, 1829 d. June 29, 1872 and married Mary Jane Chambers October 18, 1860. They at least had one daughter: Nancy Jane Elkin.
His father was Smallwood Acton Elkin b. April 7, 1806 d. March 30, 1865 in Colin County, Texas. Smallwood married Lucinda G. Bush b. November 14, 1809 d. after 1860. Their children were: 1) William Fletcher 2 )Phillip Bush 3 )Dullie 4 )Frank 5) Adalade 6) ? Gholsonmale 7) Nancy Gholson b. January 24, 1831 d. November 25, 1856 m. William Martin Bush 1848 Nancy & William had Leslie Walker Bush b. September 8, 1850 (His descendants & his father's ancestors detailed on Bush Family webpages)
Martha Haggard Elkin may have been Smallwood Acton Elkin's sister, She too married a Bush; one of her sons is named Phillip Smallwood Bush
Nancy Jane Elkin supposedly married William Creighton Harris and that is the connection I am trying to establish.
William F. Elkin and Smallwood Acton Elkin are part of a few Bush genealogy webpages, but with no tracing of the Elkin line.